Finding the Fourth Proportional to 78,412.77, 108,210.78 and 42,603.48

Step by Step Solution

1. Step 1: Write the proportion equation
   78,412.77 : 108,210.78 = 42,603.48 : x
2. Step 2: Convert to fraction form
   78,412.77/108,210.78 = 42,603.48/x
3. Step 3: Cross multiply
   78,412.77x = 108,210.78 × 42,603.48
4. Step 4: Simplify right side
   78,412.77x = 4,610,155,801.51
5. Step 5: Solve for x
   x = 4,610,155,801.51/78,412.77
6. Step 6: Final answer
   x = 58,793.43